Re: [PATCH] bttv: Add a radio compat_ioctl file operation.

From: Mauro Carvalho Chehab
Date: Sat Mar 22 2008 - 21:02:22 EST

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In reply to: Bongani Hlope: "Re: [PATCH] bttv: Add a radio compat_ioctl file operation."
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On Sat, 22 Mar 2008, Bongani Hlope wrote:

On Saturday 22 March 2008 02:05:57 Robert Fitzsimons wrote:
Signed-off-by: Robert Fitzsimons <robfitz@xxxxxxxx>
---
drivers/media/video/bt8xx/bttv-driver.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

Hi Bongani

I only noticed that you might be using a 32 bit userspace, so the radio
compat_ioctl needs to be implmented.

Robert

diff --git a/drivers/media/video/bt8xx/bttv-driver.c
b/drivers/media/video/bt8xx/bttv-driver.c index 5404fcc..1bdb726 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -3601,6 +3601,7 @@ static const struct file_operations radio_fops =
.read = radio_read,
.release = radio_release,
.ioctl = video_ioctl2,
+ .compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
.poll = radio_poll,
};

I run a 64-bit kernel and 64-bit user-space, only a chrooted version of
mplayer and it's dependencies are 32 bit, and I don't use them that often.

file /usr/bin/radio
/usr/bin/radio: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for
GNU/Linux 2.6.9, dynamically linked (uses shared libs), stripped

That patch doesn't help also...

Unfortunately, I coudn't reproduce your bug here.

I tested with a bttv board, plus two radio applications - radio and kradio
(radio-3.95-7mdv2008.0 and kradio-1.0-0.r497.3mdv2008.0 packages). None of them used V4L1 API. I also tested reading frequency, using
v4l-info /dev/radio0

I also used ioctl-test, running all V4L1 API calls, with this result (I've enabled debug on v4l1-compat, and added a small patch to bttv to use video_ioctl2 debug):

Linux video capture interface: v2.00
bttv: driver version 0.9.17 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
bttv0: Bt848 (rev 17) at 0000:05:06.0, irq: 16, latency: 32, mmio: 0xce000000
bttv0: using: STB, Gateway P/N 6000699 (bt848) [card=3,insmod option]
bttv0: gpio: en=00000000, out=00000000 in=00fbffff [init]
bttv0: tuner type=2
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: registered device radio0
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_STREAMOFF, dir=-w (0x40045613)
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_OVERLAY, dir=-w (0x4004560e)
v4l1-compat: VIDIOCCAPTURE / VIDIOC_PREVIEW: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_AUDIO, dir=r- (0x80345621)
BT848 radio (STB, Gateway P/N 6: Get for index=0
BT848 radio (STB, Gateway P/N 6: index=0, name=Radio, capability=0, mode=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=9963785, type=2, name=Mute, min/max=0/1, step=0, default=0, flags=0x00000000
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_CTRL, dir=rw (0xc008561b)
BT848 radio (STB, Gateway P/N 6: Enum for index=9963785
BT848 radio (STB, Gateway P/N 6: id=9963785, value=-32512
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_TUNER, dir=rw (0xc054561d)
BT848 radio (STB, Gateway P/N 6: index=0, name=Radio, type=1, capability=0, rangelow=0, rangehigh=0, signal=0, afc=0, rxsubchans=0, audmode=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCAP, dir=r- (0x80685600)
BT848 radio (STB, Gateway P/N 6: driver=bttv, card=BT848 radio (STB, Gateway P/N 6, bus=PCI:0000:05:06.0, version=0x00000911, capabilities=0x00010000
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_ENUMINPUT, dir=rw (0xc050561a)
BT848 radio (STB, Gateway P/N 6: index=0, name=Radio, type=1, audioset=0, tuner=0, std=00000000, status=0
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_ENUMINPUT, dir=rw (0xc050561a)
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_ENUM_FMT, dir=rw (0xc0405602)
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_ENUMINPUT, dir=rw (0xc050561a)
BT848 radio (STB, Gateway P/N 6: index=0, name=Radio, type=1, audioset=0, tuner=0, std=00000000, status=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_STD, dir=r- (0x80085617)
BT848 radio (STB, Gateway P/N 6: value=00000000
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FBUF, dir=r- (0x8030560a)
v4l1-compat: VIDIOCGFBUF / VIDIOC_G_FBUF: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FREQUENCY, dir=rw (0xc02c5638)
BT848 radio (STB, Gateway P/N 6: tuner=0, type=1, frequency=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
BT848 radio (STB, Gateway P/N 6: type=video-cap
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
v4l1-compat: VIDIOCGPICT / VIDIOC_G_FMT: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_TUNER, dir=rw (0xc054561d)
BT848 radio (STB, Gateway P/N 6: index=0, name=Radio, type=1, capability=0, rangelow=0, rangehigh=0, signal=0, afc=0, rxsubchans=0, audmode=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_STD, dir=r- (0x80085617)
BT848 radio (STB, Gateway P/N 6: value=00000000
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
BT848 radio (STB, Gateway P/N 6: type=vbi-cap
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
v4l1-compat: VIDIOCGVBIFMT / VIDIOC_G_FMT: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
BT848 radio (STB, Gateway P/N 6: type=video-over
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
v4l1-compat: VIDIOCGWIN / VIDIOC_G_WIN: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
BT848 radio (STB, Gateway P/N 6: type=video-cap
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
v4l1-compat: VIDIOCGWIN / VIDIOC_G_FMT: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
BT848 radio (STB, Gateway P/N 6: type=video-cap
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
v4l1-compat: VIDIOCMCAPTURE / VIDIOC_G_FMT: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_AUDIO, dir=-w (0x40345622)
BT848 radio (STB, Gateway P/N 6: index=0, name=, capability=0, mode=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=9963785, type=2, name=Mute, min/max=0/1, step=0, default=0, flags=0x00000000
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_CTRL, dir=rw (0xc008561c)
BT848 radio (STB, Gateway P/N 6: id=9963785, value=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_TUNER, dir=rw (0xc054561d)
BT848 radio (STB, Gateway P/N 6: index=0, name=Radio, type=1, capability=0, rangelow=0, rangehigh=0, signal=0, afc=0, rxsubchans=0, audmode=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_TUNER, dir=-w (0x4054561e)
BT848 radio (STB, Gateway P/N 6: index=0, name=Radio, type=1, capability=0, rangelow=0, rangehigh=0, signal=0, afc=0, rxsubchans=0, audmode=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_INPUT, dir=rw (0xc0045627)
BT848 radio (STB, Gateway P/N 6: value=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_STD, dir=-w (0x40085618)
BT848 radio (STB, Gateway P/N 6: value=000000ff
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_FBUF, dir=-w (0x4030560b)
v4l1-compat: VIDIOCSFBUF / VIDIOC_S_FBUF: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FREQUENCY, dir=rw (0xc02c5638)
BT848 radio (STB, Gateway P/N 6: tuner=0, type=1, frequency=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_FREQUENCY, dir=-w (0x402c5639)
BT848 radio (STB, Gateway P/N 6: tuner=0, type=1, frequency=0
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw (0xc0445624)
BT848 radio (STB, Gateway P/N 6: id=0, type=0, name=42, min/max=0/0, step=0, default=0, flags=0x00000001
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
BT848 radio (STB, Gateway P/N 6: type=video-cap
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
v4l1-compat: VIDIOCSPICT / VIDIOC_G_FMT: -22
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FBUF, dir=r- (0x8030560a)
v4l1-compat: VIDIOCSPICT / VIDIOC_G_FBUF: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_INPUT, dir=rw (0xc0045627)
BT848 radio (STB, Gateway P/N 6: value=0
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_STREAMOFF, dir=-w (0x40045613)
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
BT848 radio (STB, Gateway P/N 6: type=video-cap
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_G_FMT, dir=rw (0xc0d05604)
v4l1-compat: VIDIOCSWIN / VIDIOC_G_FMT: -22
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_FMT, dir=rw (0xc0d05605)
BT848 radio (STB, Gateway P/N 6: type=video-over
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_S_FMT, dir=rw (0xc0d05605)
v4l1-compat: VIDIOCSWIN / VIDIOC_S_FMT #2: -22
BT848 radio (STB, Gateway P/N 6: err:
BT848 radio (STB, Gateway P/N 6: v4l2 ioctl VIDIOC_QUERYBUF, dir=rw (0xc0585609)
v4l1-compat: VIDIOCSYNC / VIDIOC_QUERYBUF: -22

I got no oops. The tests were done also on a 64bit kernel, on a dual-core machine.

Cheers,
Mauro

---

I've patched the ioctl-test program (at v4l2-apps/test dir, on v4l/dvb development environment, available at http://linuxtv.org/hg/v4l-dvb) with this diff:

diff -r f24051885fe9 v4l2-apps/test/ioctl-test.c
--- a/v4l2-apps/test/ioctl-test.c Tue Mar 18 18:10:06 2008 -0300
+++ b/v4l2-apps/test/ioctl-test.c Sat Mar 22 21:52:16 2008 -0300
@@ -47,6 +47,8 @@ typedef __u32 u32;
#else
typedef u_int32_t u32;
#endif
+
+#define CONFIG_VIDEO_V4L1_COMPAT

/* All possible parameters used on v4l ioctls */
union v4l_parms {
@@ -142,7 +144,7 @@ int ioctls[] = {
VIDIOCSYNC,/* int */
#endif
/* V4L2 ioctls */
-
+#if 0
VIDIOC_CROPCAP,/* struct v4l2_cropcap */
VIDIOC_DQBUF,/* struct v4l2_buffer */
VIDIOC_ENUMAUDIO,/* struct v4l2_audio */
@@ -173,7 +175,7 @@ int ioctls[] = {
VIDIOC_S_OUTPUT,/* int */
VIDIOC_S_PARM,/* struct v4l2_streamparm */
VIDIOC_TRY_FMT,/* struct v4l2_format */
-
+#endif
#if 0
VIDIOC_G_AUDIO_OLD,/* struct v4l2_audio */
VIDIOC_G_AUDOUT_OLD,/* struct v4l2_audioout */
@@ -214,7 +216,7 @@ int main (void)
{
int fd=0, ret=0;
unsigned i;
- char *device="/dev/video0";
+ char *device="/dev/radio0";
union v4l_parms p;

if ((fd = open(device, O_RDONLY)) < 0) {
--
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